goodolboy89:
I hope that I am reading your post correctly...
There are a number of ring and pinion sets available for TracKicks (Geo Trackers and Suzuki Sidekicks are essentially the same thing) - both OEM and aftermarket.
The important thing to remember is that the front and rear ring and pinions on TracKicks are NOT interchangable! The front axle is aluminum, offset to the passenger side and has a smaller differential housing assembly. The rear axle is steel, centered and - most important - has a larger differential housing assembly.
Many people - including some folks at repair shops - confuse the TracKick with the Samurai. While they are all Suzuki products, the TracKick has an IFS front suspension (duh!) while the Samurai sports a solid front axle with nominally interchangable differentials from front and rear.
I hope that this helps!